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首页> 外文期刊>Journal oflaser Applications >Thermal stress analysis on laser cross scribe of glass
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Thermal stress analysis on laser cross scribe of glass

机译：玻璃激光划线的热应力分析

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摘要

In CO_2 laser scribe processing of glass, an initial crack on the start edge of the glass is indispensable. When carrying out laser cross scribe, there is no initial crack on the edge of the first scribed line. However, the second scribing progresses across the first scribed line. In this research, in order to clarify the phenomena of laser cross scribe, the laser irradiation experiments were carried out at various velocities of the second scribing. Using the same conditions as the experiments, three-dimensional thermal stress analyses were conducted by a finite element method. As a result, two kinds of forms were found in the progresses of the second scribing. One is a form that the first scribed crack surfaces are bonded by strong compression at high temperature in the heating area during the second scribing. The other is a form that the tensile stress in the cooling area which makes the second scribing progress is transmitted by the frictional force generated in the first scribed crack surface. Consequently the second scribing progresses across the first scribed line although there is no initial crack on the edge of the first scribed line.
机译：在玻璃的CO_2激光划线处理中，在玻璃的起始边缘上的初始裂纹是必不可少的。进行激光划线时，第一条划线的边缘没有初始裂纹。但是，第二划线在第一划线上进行。在这项研究中，为了澄清激光划痕现象，在第二刻划的各种速度下进行了激光照射实验。在与实验相同的条件下，通过有限元方法进行了三维热应力分析。结果，在第二次划线的过程中发现了两种形式。一种形式是在第二刻划期间在加热区域中在高温下通过强压缩将第一划痕的裂纹表面结合。另一种形式是通过在第一划痕裂纹表面上产生的摩擦力来传递进行第二划线的冷却区域中的拉应力。因此，尽管在第一划线的边缘上没有初始裂纹，但是第二划线在第一划线上进行。

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